package com.duzhuo.common.thread;

import org.apache.commons.lang3.concurrent.BasicThreadFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.*;

/**
 * 线程池配置
 *
 * @author 万宏远
 **/
@Configuration
public class ThreadPoolConfig {
    /**
     * 核心线程池大小
     */
    private int corePoolSize = 20;

    /**
     * 最大可创建的线程数
     */
    private int maxPoolSize = Integer.MAX_VALUE;

    /**
     * 队列最大长度
     */
    private int queueCapacity = 1000;

    /**
     * 线程池维护线程所允许的空闲时间
     */
    private int keepAliveSeconds = 300;

    @Primary
    @Bean(name = "threadPoolTaskExecutor")
    public ThreadPoolTaskExecutor threadPoolTaskExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setMaxPoolSize(maxPoolSize);
        executor.setCorePoolSize(corePoolSize);
        executor.setQueueCapacity(queueCapacity);
        executor.setKeepAliveSeconds(keepAliveSeconds);
        // 线程池对拒绝任务(无线程可用)的处理策略
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        return executor;
    }

    @Bean(name = "threadPoolExecutor")
    public ThreadPoolExecutor threadPoolExecutor(){
        return new ThreadPoolExecutor(corePoolSize,maxPoolSize,1, TimeUnit.SECONDS, new ArrayBlockingQueue<>(10),Executors.defaultThreadFactory(),new ThreadPoolExecutor.AbortPolicy());
    }

    /**
     * 执行周期性或定时任务
     */
    @Bean(name = "scheduledExecutorService")
    protected ScheduledExecutorService scheduledExecutorService() {
        return new ScheduledThreadPoolExecutor(corePoolSize,
                new BasicThreadFactory.Builder().namingPattern("schedule-pool-%d").daemon(true).build()) {
                    @Override
                    protected void afterExecute(Runnable r, Throwable t) {
                        super.afterExecute(r, t);
                        Threads.printException(r, t);
                    }
                };
    }
}
